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Finding the Fourth Proportional to 620,442.30, 930,663.45 and 305,514.30

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Solution

The fourth proportional to 620,442.30, 930,663.45 and 305,514.30 is: 458,271.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,442.30 : 930,663.45 = 305,514.30 : x
  2. Step 2: Convert to fraction form
    620,442.30/930,663.45 = 305,514.30/x
  3. Step 3: Cross multiply
    620,442.30x = 930,663.45 × 305,514.30
  4. Step 4: Simplify right side
    620,442.30x = 284,330,992,462.34
  5. Step 5: Solve for x
    x = 284,330,992,462.34/620,442.30
  6. Step 6: Final answer
    x = 458,271.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.